Disk sharpening machine



July 26, 1949. P. w. BROWNE 2,477,361

DISK SHARPENING MACHINE Filed Sept. 21, 1946 2 sheets sheet 1 July 26, 1949. w BRQWNE 2,477,361

DISK SHARPENING MACHINE Fild Sept. 21, 1946- 2 Sheets-Sheet 2 PHUL .[JJLETL-INE.

WW E M25 I Patented July 26, 1949 Paul Browne; Roodhouse, Ill., assignor of fiortyminer pennant to Lee Hardwi'ck Rambhouse 111..

Application September 21, 1946, Serial No. 698,519

3% Glaims: 1

This invention: relates i to certaim new and; use:-

fulimprovements in:- machines for sharpeningzthe earth; working: discs of agrinul-tural implements, such as those ot'piaws; and: narrows;

An object of the? present inventiom isctosprovide a machine of the above kind: which: is: simple in construction and; efficient: operation, and: by means: of which. the operatiem of sharpening: the discs may be: readily pectormedaim an: expeditious manner."

Another object of: the invention: is; tan pnovide a portable machineofthe above kinda which is in the nature; of: a trailer: vehicle adapted he: be towed by amotor vehiclezforruse in the flelrl Still another oliiect ct th'ei'inventicna. is: ti): pm;-

vide a machine: of: the; abnve hindi including a a supporting platform, meansi ten remeilaiclw1on1"; nalling ashaft with: a. gang on disest im at herie' zontal position on said platctormii amez-nerw wheel,

a motor mounted on, the platform, novel: means for driving the gangiof discstfromsaidcmotonineluding; adriven. (acumen-shaft; and: a manually releasable friction; drive conneoticn between said counter-shaft; and: one? on the discs; at flexible shaft connecting theumotor with; the emerywheel; and; means to? mount the emeny wheel cm the platform for-movementaparallekwith the sherbet: the discs and for vertical swinging: movement so that, theremeny wheelzmayi he: readily successively engaged with theisuccessiive discssof the: gang;

Still f'ur then-obieets and: fEsitlmBSfiofttlifi incremtion will become: apparentl from: the: folinwings scription .whem censidenedii-m connecticm with the? accompanying" drawings; im whicha:

Figure L-is atom plan: view of. a: disc: sharpen-- a platform Emounted intenznediatethe frent'a'nd reat thereofiupom atiafisverse axle 6' Having coaxial: ground engaging suppcrt'ingwheels 1* jour sense: on the: pr-(iie'ctihg ends tnerecr A fithe em. plenum. 52 is provided with a centra forwardly" prdjec'ting draft bar or tongue 8- which may be braced as" at" 9 and coupled atits" forward end to the rear of th'e towing vehicle;

Rigidly mounted upon and near the-rear-oftl le platform 5-i's a pair ctlatera-lh spaced standards 9, each of which is provided at the top with a shaftrest HPha-vi-ng spaced rollers l l uperrwhich the shaft E 201" thegang of discs [3 to he sharpened is adapted tobe' rotatalily supported; For this purpose, the rollers H arespaced apart a dis"- tance lessthan the diameterof the shaft F2 so that the latter will besupported withits ina vertical plane passing between the rollers l l. In order t'o releasably-hold the shait [-2 down in engagement with the rollers l' l' oragains't a c cidental displacement frombetween" them; each rest H1 is provided wit-ha confining strap- M adaptedto' he disposed across the sha-ft l2 and detachably fastened" down asat i=5.- Tlie strap M' prevents upward or lateral displacement" of the shaft; l from its position restingupon the rollers H, although exerting ne frictional or clampingpressure onthe shaft I'Zi Mounted on the pIa-tfbrm 5- ferwardlyef the standards 9 is a sci-tame motor I 6 which mayhe an electric motor or an internal comhustion er'rgins. This motor has a drive shaft which pro J'ects both forwardly and rearwamiy for a arpose which will presently Become-apparent;

Mounted in a horizontal position transversely of the platform 5 and rearwardly' of" tliestandards 9 is a guide rod [1; the ends of' said guide rod. being secured in sockets provided at" the upper ends of spaced supporting standards 8: secured on the platform 5-. Slidable on the res I1 is a sleevel-9'- upon which is detachably se cured ablock 2 attached to one end of the flex"- ible housingortubing; 21 that encasesa fiexilele shaft 22' having one end coupledto-the rearprth je'cting' end ofthe driveshaft" of motor l t. The other end of shaft 22 is coupled to theshaft 2-3 of a grinding wheel or mery wheel 24 disposed directly in front of the sleeve i=5. Sleeve I9 is free to turn about rod H as well astoslid'e-longitud'i'nally of the latter, and thearr'angement is such that when the" sleeve IB' is positioned as shown in Figure 6", the emery wheel 24 is ar ranged to engage the edge of the adjacent" disc I3 for sharpening the latter. Byturning the sleeve 19 in the proper direction, the emery'wheel 24 may be tilted" upwardly and rearwardly so as to disengage the adjacent disc, whereupon the sleeve 19 may be adjusted lengitud'inally of the rod IT for the purpose of engaging theerner'y wheel 24 with the next 6rsucceeding disc of the gang. This may be done so as to successively sharpen all of the discs, and it will be apparent that the emery wheel 24 may be engaged with of discs may be readily removed by releasing the hold-down straps I4. I

In order to secure a uniform sharpening of the discs entirely around their edges, the shaft l2 is slowly rotated so as to rotate the discs during the sharpening operation with respect to each. disc. As the discs l3 are secured on the shaft 22, it will be apparent that rotation imparted to an end one of the discs M! will, cause rotation of all of them and the shaft I2. Mounted longitudinally of and along one side of the platform 5 is a counter-shaft having a large pulley 26 secured thereon near the forward end thereof. Pulley 23 is aligned with a small pulley 2'! secured on the forwardly projecting end of the drive shaft of motor l3, and an endless power transmission beit .28 is passed around the pulleys 26 and 27 so that rotation of the drive shaft of motor I3 is transmitted to the counter-shaft 25. Secured on the rear end of counter-shaft 25 is a friction wheel 29 disposed to engage the outer side of the adjacent end one of the discs |3 for driving the latter when the gang of discs is properly positioned for sharpening of the discs. It will be noted that the shaft I2 is displaceable relative to the standards 9 axially of said shaft I 2, so that an effective driving connection is provided between the wheel 29 and the adjacent disc when the latter is pressed toward and against the periphery of the wheel 29. In order to so press the adjacent end disc l3 against the periphery of the wheel 29, I provide an arm 30 which is pivoted at its lower end upon the platform 5 as at 3| and which has a friction wheel 32 journalled in the upper end thereof. The arm 30 and wheel 32 are so arranged that the wheel 32 may engage the adjacent end disc I 3 at the inner side of the latter. Thus, by swinging the arm 30 outwardly, wheel 32 is caused to press the adjacent disc i3 into engagement with the periphery of the friction drive wheel 29. Such movement of arm 30 may be elfected by suitable means such as a hand lever 33 connected with the arm 30 by a link 34, suitable means being provided to latch the lever 33 in adjusted position. The latching means referred to may consist of a conventional rack segment 35 co-acting with a latch pin of lever 33 as is conventional in the machine element art. By swinging the arm 39 inwardly, wheel 32 may be disengaged from the adjacent disc l3 so that insufficient friction is had between the wheel 29 and said adjacent disc I 3 for driving the gang of discs.

The present inventionalso contemplates the provision of means whereby a single flat earth working disc 36 may be supported and driven for being sharpened by the emery wheel 24 upon detachment of the block 28 from the sleeve l9, such flat earth working discs being commonly employed as rolling cutters for various agricultural implements. For instance, such a flat rolling disc cutter is employed as a coulter for certain types of plows. Counter-shaft 25 is supported by spaced standards 31, one of which is arranged directly in front of the pulley 26 as shown in Figure 3. The shaft 25 projects forwardly of its front standard 31, and the projecting forward end of said shaft 25 has a centering cone 38 secured thereon. This cone is adapted to be received in the hub of the disc 36 at the rear of the latter, and a similar centering cone 38' is adapted to be removably received on the shaft 25 in front of the disc 36 for reception in the hub of the latter at the front of said disc 36. By forcing the centering 'cone 38' rearwardly, the cones 38 and 38 will provide an efficient driving connection between the disc 36 and shaft 25 with said disc 36 accurately centered with respect to the shaft 25. As

shown, thecentering cone 38' is swivelled in a bracket 39 hinged at 40 to a lever 4|, and lever 4| is pivoted at its upper end as at 42 to a bracket 43 secured upon the front standard 37. A rack bar 44 is fixed to the standard 37 and projects through the lower end portion of lever 4|, and a spring pressed catch 45 is carried by the lower end of lever 4| for engagement with the teeth of the rack bar 44. The purpose of the catch 45 and rack bar 44 is to provide means for releasably securing the lever 4| in rearwardly swung position with the cone 38 properly entered into the hub of the disc 36 to provide the centered driving connection between the shaft 25 and said disc 33. When this is done, disc 36 i effectively driven by motor l6 so that the emery wheel 24 may beused to sharpen the edge of said disc 33 when the' emery Wheel is driven by the motor |6.' At this time, the emery wheel is, of course, supported in the hand by gripping the adjacent end of the shaft housing 2|. Obviously, when sharpening of the disc 33 has been completed, catch '45 may be disengaged from rack bar 44 so that lever 4| may be swung forwardly to remove the centering cone 38' from the shaft 25 and thereby permit removal of the disc 36 from the latter. 2 2

From the foregoing description, it is believed that the construction, operation and advantages of the present invention will be readily understood and appreciatedby those skilled in the art. Modifications and changes in details of construction are contemplated, such as fall within the spirit and scope of the invention as claimed.

What I claim is:

1. A disc sharpening machine comprising a platform, a pair of laterally spaced standards mounted on the platform near the rear of the latter, shaft rests carried by the upper ends of said standards for rotatably supporting the shaft of a gang of discs transversely of the platform, a hold-down element for maintaining the shaft of the gang of discs in the rest of each standard, a guide rod mounted in an elevated position transversely of the platform rearwardly of said standards, a sleeve longitudinally slidable on said guide rod, a flexible shaft having a flexible housing coupled at one end to said sleeve so as to be detachable from the latter, an emery wheel attached to one end of said flexible shaft, a motor mounted on the platform in front of said stand ards and having a rearwardly projecting drive shaft coupled to the other end of said flexible shaft for driving the latter, a friction wheel engageable with an end one of a gang of discs supported in the rests of said standards for driving said gang of discs, and driving connections between said motor and said friction wheel.

2. The construction defined in claim 1, in combinationwith a counter-shaft journalled on the.

platform longitudinally of and near one side of the latter, a driving connection. between said counter-shaft and said motor, said friction wheel being secured on the rear end of the countershaft, and manually operable means for effecting movement of the gang of discs transversely of the platform and toward the friction wheel for pro- Viding an effective friction drive connection between said friction wheel and the adjacent end one of the gang of discs.

3. A disc sharpening machine comprising a two-wheeled trailer vehicle having a platform and a forwardly projecting draft tongue, a motor mounted on and near the front of said platform and having a rearwardly projecting drive shaft, a countershaft journaled on said platform longitudinally of and near one side of the latter, a driving connection between said motor and said countershaft, means to removably journal a gang of earth working discs upon the platform transversely of and near the rear of the latter, a friction wheel secured on the rear end of said countershaft and engageable with an end disc of said gang of discs for driving the latter, an emery wheel, and a flexible shaft operatively connecting the drive shaft of the motor and the emery wheel so as to drive the latter for use in sharpening the edges of the gang of earth working discs.

PAUL W. BROWNE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

